Tinkering

[Bacon_Cheese_Burger]

Currently when doing tinkering, people are using 1 tinkering ingridient (marked in blue) and x random ones (not marked) The random ones make little sense, and are often food items or the likes, that you can get your hands on easy.
I suguest a merchant sells the "filler" items not the "tinkering ingridient" It could be things like
screws.
Nails.
Cogs.
some could be made in copper, others silver and so on. That way a person doing tinkering will have some good propper items to use, instead of trashgull eggs, or what not.